Analysts watch orders closely to gauge future earnings when customers take delivery. The company, which is tracked on the Dow Jones Industrial Average of the biggest US firms, enjoyed a strong 2016.

It traded at lows of $102.10 per share in February, but has since risen to trade well above $150 per share.

VietJet Air, a budget airline based in Vietnam, was the biggest customer to be identified by Boeing, ordering 100 new aircraft in 2016. GE Capital Aviation Services, which leases aircraft and engines to airlines, placed the second most orders, at 75.

United Airlines and Qatar Airways were other notable customers identified in the report.